The soft rubbery kind of vanes are horrible with the biscuit don' t use them! Use the harder shiny kind of vanes from Bohning or Norway Duravanes. Feathers work well with the biscuit, so do Turbonocks. What is more important is to make sure you have the correct spine arrows for your bow. Underspined arrows will bend and flex as they go through the rest and that will raise hell with your groups and your fletching. Good luck hunting!